设椭圆C:
的左焦点为F,上顶点为A,过点A与AF垂直的直线分别交椭圆C与x轴正半轴于点P、Q,且
, 椭圆C的离心率为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea42d0e090fd7bfd4ca6bd3a4297a1ac.png)
更新时间:2019-10-02 13:18:29
|
【知识点】 求椭圆的离心率或离心率的取值范围
相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】椭圆
的左、右焦点分别为F1,F2,P为椭圆M上任一点,且|PF1|•|PF2|的最大值的取值范围是[2c2,3c2],其中
,则椭圆M的离心率e的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5c4fecc970ce1a556591f365ea4e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57654bf131df03b31d3d11b5b656c73d.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】如图,焦点在
轴上的椭圆
的左、右焦点分别为
,
,
是椭圆上位于第一象限内的一点,且直线
与
轴的正半轴交于
点,
的内切圆在边
上的切点为
,若
,则该椭圆的离心率为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115bca90bb941e1784a3b47060c8892d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83e02c09428538ce8ae136cff26d3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa65e9e7125c4bd360cf71ea4439e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5efe3e1966a6abcf6f231836aeb867b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/f1cd59ed-88a7-4d7f-9e5c-175d942376a4.png?resizew=157)
您最近一年使用:0次